"Actual video game."
It's really fun and plays like Diablo-lite. You're doing the typical thing of moving around while using various abilities to smash hordes of enemies and the occasional big gribblies. I'm not a big fan of touch-screen controls but the game makes the most of it by allowing you to move with your left-thumb and aim with your right (very handy for AoE and movement abilities.) Kinda like a twin-stick shooter but with more sticks and you can't tell where the sticks are without looking and sometimes use the wrong spell.
I'm enjoying the story so far, some fun little nostalgia-bombs and a really cool moment where you relive the memory of Tal Rasha and Zoltan Kull imprisoning Baal in his soulstone.
It is dumbed down though, but personally I don't care as I can't play a mobile game the way I do a PC one. Exploration is minimal as zones are more linear and you have a footprint trail to follow. Most gear and gem upgrades are flagged with a little arrow and whichever you choose you get a trail again (for example if you see an item has an arrow clicking it might show the gems can be upgraded. Clicking the gem will give you a trail to the gem person.) Once you hit a certain point in each zone it opens up auto-navigate.
Core gameplay is simplified too. Most abilities are simply on a cooldown or have their own energy to draw from (I've only really played the barbarian though) and build variety is much more limited than I initially thought. Still there are fun things like unlocking the equivalent of glyphs by going through the challenge rifts and extracting legendary powers from items to use on others.
If you want a story that bridges Diablos 2 and 3 and to have fun killing monsters this game does a really good job of shrinking D3 down to a mobile device. If you're looking for some sort of digital skinner box that will provide you with regular hits of dopamine without having to pay out a shed-load of cash you might want to look elsewhere.